Back for brake-shoes.



P. W'. SARGENT.

BACK FOR BRAKE SHOIE.

, rrrrrrrrrrrrrr 2131130. 111111 7. r: 907,892, I Patented Dec.29, 1908.

rrs rarn r caries.

FlTZ W. SARGENT, OF MAHWAH,NEW JERSEY, ASSIGNOR TO EDWARD H. FALLOWS, OF NEW YORK, N; Y.

sack ronnn-AKn-snons.

n. screen. f I flpecification of Letters Pa ent. Patented Dec. 29, 1908. Application filed December 19, 1907. Serial No. 407,146.

Eh afi whc m "it 1M4} conbem: I 4 formed.- By the formation of these openhe it known that'L'Frrz l SARGENT, a ings B are also secured the transverse strips citizen of the United. States, and a resident E, E, which bind and hold in place the ends of Mahwah, in the county of Bergen and, of the strips C, it being understood that the State of New Jersey, have made and inventl blank thus formed has no out or opening exan ed certain new and useful 1m; rovements in tending entirely through it, either crosswise Backs for Brake-Shoes, of which the followor lengthwise. The width of the plate, or in ing is a specification. l f other words, the length of thecross strip or My invention relates to. an improvedsteel strap D, is sufiicient to allow slde strip to be back for u in brake shoes, and the method bent or struck upwardly into the shape of an as ofmaking he same,'such as are adapted for attaching lug, this operation drawing in use upon the wheels of railway cars, and is wardly or towards each other, the central more particularly adapted for use with the i portions of the stri s or straps C, thereby type of shoe known as the M. C. B. Christie causing the skeleton ack to assume an equal a nnfianged brake shoe." v or uniform width throughout its length, the 7a The object of my invention is to form a central portion thereof being pulled in by the steel back with an integral attaching lug, bending of the strap D until it equals in width and with integral transverse binding portions the width of'the ends. This skeleton back is at each end thereof, thereby securing great also given 'a slight transverse curve, as illusas strength and also providing for a firm a'nchortrated in Fig. 5, this bending or shaping tend 75 age between the back and the body of .the ing to slightly open the cut-outs and giving shoe. to the edges of the several openings a bevel With this and other ends in vi-w, the inwhichserves to hold the body or cast metal vention consists in certain novel features of to it, and permitting the edges of the back to construction, as will be hereinafter fully debecompletely embedded or submcrgedjn'the so scribed and specifically pointed out in the cast metal of the body. claims. I In order to economize the metal of the In the accompanying-drawings Figure 1 is steel back, 1: preferably make the loop or lug a top plan view of the blank for my improved of such a size as to inclose what is known as steel back, after being punched out before the M. C. B. Christie standard core, that is, 85 receiving its final shape. Fig. 2'is a similar the loopDwill be of such dimensions as to view of the back after being shaped. Fig. 3' just encircle the core placed in the hole to is a sectional view taken onthe line 3-3 of form the key-way, the cast metal of the body Fig. 1. Fig. 4 is a sectional view taken flowing around and over the lug to the proper through the key-lug, and on the lined- 1: of dimensions. If desired, however, .a wider so Fig. 2. Fig. 5 is a sectional view taken on plate may be employed, in order that the the line 5-5 of Fig. 2. transverse strip or strap 1) may be of such In carrying out my invention, I employ a length as to have the outside dimensions of strip of mild steel, wrought or other tough the M. C. B. Christie lug, in which instance, 40 metal, preferably about thr'ee-sixteenths of of course, the cast iron would be allowed to 95 an inch thick, the ends of which plate in flow beneath it about the core. width are approximately the width of the From the above description it will be seen shoe to which the back is to be attached, the that I have provided a skeleton steel back of plate increasing in width from each end togreat strength, the key-lugbeing formed in-' ward the center of its length. The extreme teg'ral therewith, the ends being held or 100 ends of the plate are cut out as illustrated at bound together by integral transverse stri s. A, these dovetailed notches assisting in The openmgs formed therein, having beve ed forming a lock for the body metal at what is edges by reason of the transverse curvature known as the end stop and brake head guide. of the back, the cast metal of the body of the At either side of the center of the plate I shoe to which it is to'be attached securely 105 form the wedge-shaped openings B, thereby and firmly anchors the back in place, avoidforming the two strips or stra'ps of metal .0 1 ing all danger of it's-becoming detached from and the transverse strip or strap D, thelatter l the body of the shoe should the latter bein width being substantially canal to that of i come cracked or)orokenthe attachinglug intowhicleitis subsequently 1 Having fully described my inventiomwhat 1 10 two side strips connected at their ends and center by transverse stri s, the back being transversely curved, su istantially as de scribed.

3. A back for a brake shoe formed of a single plate, the longitudinal edges of which diverge toward the center, said plate having openings formed therein on either side of the center, whereby are formed transverse strips connecting the ends and center of the side strips, substantially as described.

4. A back for a brake shoe consisting of side strips connected at their ends and center by transverse stri s, the central transverse strip being formed into a key-lug, said back having a longitudinal and transverse curvature, substantially as described.

5. The herein described method of form ing a back for a brake shoe, which consists in forming the skeleton diamond-shaped blank, then drawing in the central portions oi the side strips whereby the sides will become parallel, and forming a key-lug from the central transverse connecting stri (i. The herein described method of torming aback for a brake, shoe, \rhirh consists in forming the skeleton back having side strips 1 connected by short transverse connecting strips and the center b a longer transverse connecting strip, then drawing in the central portions of the side strips towards one :Hl other and forming t key-lug from the said longer central transverse connecting strip whereby said strips heroine parallel.

Signed at Mahivah in the county of Bergenand State of New Jersey this 14th day of Dec. A Dt 1907.

FITZ Vr'. SAhGiCNi. \Vitnesses:

C; F. llnntnnt, ll. L. LEWIS. 

